Spring motor



May 18,1926. 1,585,161

F. MAGIDSON SPRING MOTOR Filed Dec. 3 0, 1921 2 Sheets-Sheet 1 W/ rwmmas atented May 18, 1926.

tlttllifi TATES SPRING MOTOR.

Application filed. December This invention rel-ates to spring motors and particularly to motors for transmitting oscillatory or reciprocating motion.

An object of my invention is to produce a more effective spring motor than those now in use and known to me.

A further object is to produce a spring motor for transmitting oscillatory or reciprocating motion so constructed that it transmits a double impulse to the driven element during each cycle, or one which transmits power to the oscillatory or reciprocating element at each reversal in the direction of travel of that element.

These and other objects which will be made more apparent throughout the further description of the invention are attained by means of apparatus embodying the features herein described and illustrated in the drawings accompanying and forming a. part hereof.

In the drawings, Figure 1 is a sectional view of a cradle equipped with a motor embodyin g my invention.

2 is an end view of the cradle shown in Fig. 1 and Fig. 3 is a detail of a portion of the motor illustrating the ratchet and the arrangement of the pawls for imparting a double impulse to the oscillatory arm during each cycle of operation.

As illustrated, the cradle includes a frame having end supports 5 and a cross piece 6 so arranged that it forms a housing for the spring motor. The bed frame or hammock 7 is suspended between the supports 5 by means of hangers t. Swinging or oscillatory motion is imparted to the frame 7 by means of the oscillating member or arm 9 forming a part of the spring motor.

As shown, the motor is similar in some respects to the spring motor illustrated. and described in my Patent No. 1,342,857 of June 8,1920 and is mounted on the cradle frame in substantially the manner there illustrated.

It includes a coil spring 11 which surrounds a sectional core 12 and is operatively secured to a ratchet wheel 13 which operates the oscillating arm 9 through the agency of pawls 14- and 15 pivotally secured to the arm 9.

The core 12 is made up in short sect-ions 1616 which are so assembled that while they are held in alii'ieinent and are capable of supporting the intermediate portion of the spring 11, each section is rotatable with relation to adjacent sections. ny suitable 30, 1921. .Serial No. 526,011.

means may 'be employed for operatively securing the movable end of the spring tothe ratchet wheel 13. In the drawings, Thave shown one end of the spring rigidly secured to the section 16 adjacent the ratchet wheel 13 and pin 1'? Xtends diametrically through this section and its projecting ends are engaged by lugs 18 stamped from the ratchet wheel. The other end of the spring is rigidly secured to the section furthest removed from the wheel 13, and that section is rigidly secured to the adjacent support by a pin 17 which engages a bracket 5 rigidly secured to one of the supports The ratchet wheel may be mounted on the overhung end of a shaft 19 journaled in a bearing collar 19 formed integrally with a bearing plate 20. The plate 20 is rigidly secured to the adjacent support 5 in such manner that the collar 19 and shaft 19 project therethrough. A handle 18 is secured to the shaft for winding the spring 11.- The arm 9 is shown pivoted on a pin-2l which is carried by the plate 20. The pivotal point of the arm is preferably spaced outwardly from the teeth of the ratchet wheel and in the apparatus illustrated is located immediately below the axis of the wheel. In order that the arm may swing in both directions, it is provided intermediate its ends with an arc-shaped slot or yoke through which the shaft 19 extends.

1n the illustrated embodiment, the pawl 14 is shown pivotally secured to the arm 9 at a point between the pivotal axis of the arm 9 and the point of connection between the arm and the element oscillated thereby. The pivotal axis of the pawl 1 is preferably so located with relation to the pivot pin 21 and the axis of the wheel 13 that it falls within the line of the ratchet teeth, of the wheel for all positions of the arm. The pawl 15 is pivotally mounted on a lateral projection of the arm 9 and its pivotal axis is shown so located with relation to the pivotalpoint of the arm 9 that it falls within a line which passes through the pivotal point of the arm 9 and extends at right angles to the line passing through that point and the pivotal point of the pawl 14. In addition to this, the pivotal points of the pawls 1d and 15 are preferably equally distant from the pivotal point of the arm 9. With this arrangement, an impulse is imparted to the arm 9 as it swings in each direction, since the pawls 14: and 15 are alternately in engagement with the ratchet teeth of the wheel 13.

As shown, each pawl is yieldingly held in the normal or initial ratchet position, with relation to the arm 9, by.

its oppos te ends by the tumblers ach tumbler being provided will a lug or e2;-. tension w neh p1 ects ll'llTO. the end of the coilspring .nd thereby holds it in place tween the torn l rs. ii ith this ar each pawl is pi 3 held in'thenorinal position andpivotiiw either direction 1s resisted by the pres ihe coiled spring In addition the pi of each cam toria stop which postv sits the swing o the associated pawl.

Each pawl is solo-oi the arm 9 moves it out the ratchet teeth innne pawl moves into erga and the spring pe". the 111 by permitti. Each tumbler is prov ing edge with a rounded saris which is adapted to ca the swing; oft

en;- with the teeth he. o'vertravel ot awls to pivot.

-engagcorrespondon in the adv liq pawl when 'l he s1 e the lo and thelohe receiving recg sesare so located that thespr' acts alone; the line of pivotal points otthe two pawls. Each pawl is also provided with rounded cam-like projections oilobes gl'orined at each end or the recess above-mention ed. each of which,

1s adapted to engage.

sociat ed tunihler and more the tninhler to compress the spring as h pawl mores t i .ts normal position.

in one direction tron I These lobes on the parvls and tumblers ar so formed that a small relative motion of each lobe E25 willimp i r'lai- \ely large 1'3 spring-compressing movement ciated tinnbler.

1n the ilhistrated embodiment, the upper end oft-he arm ,9 is notched as at .2? to re to the "asso ceive a pin 28 rip-idly ured to the cradle frame 7. 'The pin 28 is preierahl ,*so 1%- cated that the arm stands in an int iniediate position with relation to the lin ts oi? its travel when the cradle frame han gs station-. ary., In the apparatus illustratah.the arm 9 will he vertical, as shown in F7 when the cradle traine is in this POSjlO both pawls will be in egrigenient wi teeth of the ratchet.

One oi the features of my intention is the that its ends are l W "ement .collar 19 l'eri if A aement with. the other.

ees 2a,.

LllC, lobe 25,019 the aseaseot assembling the parts making up the As previously described spr'n 7 spring- 1S rlgidly connec ed i motor.

aoh end oi the r it motor as a s e element. This operation consists merely in coating the core in place between the bracket 5 and the wheel 13 so coated between the lugs amet ano the stamped lur cl. The pins 1? and 1'? a l through openings prof d lugs and in the .CULC. lheee p riveted or bent over for the pa 7 cnrely loci the co e to the The plate 20 forms other elements ot tl has'been dzsc on a shalt wh 1 tie plate.

on the u arm 9 pivotal.

.1 .1 the pawls .L

on thearin. [ihe operation oi ratchet and its associated tore simple. since it in' mg the plate EU in t i. e supporting memo-er.

filter the is wound up, the cr:

tor the pi the co at v i I '4 1 V :l'Jlll .sioc to i M1 alternatel e1...

ino'vi 11g As the L pawls iii an impart ng a swinging i i pawl l i so located that it exerts an pulse on the arm 5) by a poll no: inned h 5 coat with the ratchet t pawl lo exerts a pliSil. In opera"' swir 'i oi, the arm 5) moves one I. engagen'ient with the ratchet whee the other pawl is still in or that wheel.

continuation i inent oi the arm XLUSGS both pawls to pit about their pivot points on the :L'il'l incdiately before travel the pawl wiich has just been etl'ecng motion to irate-net who tivein'iinp; leased from the other pawl tal zes the thrust teeth otl oi it. The re eat out oi engagement in sponse to the pl'GSSHEQ the other pawl then transmitti theforce thearm. l ith the arra'" i the'drarings and part-c t y pawl 1% 1s ehectrve tllilillf'f ti of theswing towarc 9, the pa wl to move circumferentially with relation to the wheel 13 until it abuts with the substantially radial edge of one of the ratchets. When this occurs, and it occurs immediately before or at the moment of reversal of swing of the arm 9, the pawl not only takes the thrust of the wheel 13 but momentarily reverses the movement of the wheel, thereby releasing the pawl 14. The pawl 14 then moves outwardly in response to the pressure of the spring 22, it having been held in engagement with the ratchet teethin opposition to the pressure of that spring, by the friction grip of the ratchet teeth. As soon as the pawl 14 is released, the pawl 15 assumes the function of transmitting the impelling force of the power spring 1 1 to the arm 9. As the arm 9 moves to the right in response to the force transmitted to it by the pawl 15, the pawl 14 again moves into engagement with the ratchet wheel. This occurs as the arm 9 approaches the center of its swing. Both pawls then pivot in re sponse to the further swing of the arm and at or immediately prior to the moment of reversal of the arm, the pawl 14 receives the thrust of the wheel, momentarily reverses the wheel and releases the pawl 15. These momentary reversals of the wheel 13 are, of course, accomplished by the overswing of the arm 9, and are occasioned by the inertia or stored up kinetic energy of the swinging element 7.

"While I have described but one embodiment of my invention, it will be apparent that various changes, modifications, additions and omissions may be made in the ap paratus illustrated. without departing from the spirit and scope of the invention as set forth by the appended claims.

I claim as my invention:

1. The combination in a spring motor of a spring driven ratchet wheel, a pivoted member adapted to be oscillated by rotation of said ratchet wheel, a ratchet engaging pawl associated with said memberso as to impart an impulse thereto in one direction, a second ratchet engaging pawl associated with said member for imparting an impulse thereto in the opposite direction, each of said pawls being adapted to momentarily reverse said ratchet wheel upon engagement therewith so as to release the other of said pawls from engagement therewith.

2. The combination in a spring motor of a spring driven ratchet wheel, a pivoted member adapted to be oscillated by rotation of said ratchet wheel, a ratchet engaging pawl associated with said member so as to impart an impulse thereto in one direction, a second ratchet engaging pawl associated with said member for imparting an impulse thereto in the opposite direction, each of said pawls being adapted to momentarily reverse said ratchet wheel upon engagement therewith so as to release the other of said pawls from engagement therewith and means for retracting each pawl from said ratchet wheel when so released.

3. The combination in a spring motor of a spring driven ratchet wheel, a pivoted member adapted to be oscillated by rotation of said ratchet wheel, a pivoted ratchet engaging pawl associated with said member so as to impart an impulse thereto in one direction, a second pivoted ratchet engaging pawl associated with said member for imparting an impulse thereto in the opposite direction, each of said pawls being adapted to momentarily reverse said ratchet wheel upon engagement therewith so as to release the other of said pawls from engagement therewith and spring means forv retracting each pawl from said ratchet wheel when so released.

4. The combination in a spring motor of a spring pressed ratchet wheel, a pivoted member adapted to be oscillated by rotation of said ratchet wheel, a pivoted ratchet engaging pawl associated with said member so as to impart an impulse thereto in one direction, a second pivoted ratchet engaging pawl associated with said member for imparting an impulse thereto in the opposite direction, each of said pawls being adapted to momentarily reverse said ratchet wheel upon engagement therewith so as to release the other of said pawls from engagement therewith and spring pressed tumblers associated with said pawls for retracting each of said pawls when so released.

5. A spring motor comprising a ratchet wheel, a sectional core for a spring, a coiled spring surrounding said core and having its ends rigidly secured to the end sections thereof, a stationary bracket for engaging one end section of said core and thereby holding one end of said spring against rotation, lugs formed on the said wheel, a pin for locking the other end section of said core to said lugs and for thereby operatively connecting the spring to the wheel, a shaft on which said wheel is rigidly mounted, a plate in which said shaft is journaled, an arm pivotally mounted on said plate and pawls for engaging said wheel mounted on and movable with said arm.

6. In combination in a spring motor, a spring driven ratchet wheel, a pivoted member actuated by said wheel, a pawl pivotally mounted on said member at a point spaced from the pivot point of said member, a second pawl pivotally mounted on said member at a point spaced from the pivot point. of said member, and means for moving each pawl out of engagement with said wheel during oscillations of said member after the other pawl has moved into engagement with the wheel.

'7. In combination in a spring motor, a

eoile sprn loeatei'l between and supported by sac-l i iolers For lowing each tumbler into d 'aweinent with one oi sa d pawls, end

a a eonvc; lobe on each tumbler for engaging concave recess in the essoeiated pawl, located in the line oi the pivot points of the two nawls,

(3. Lin rcinr nation in a spring motor, a an diix'n hr't wheel, a pivoted menils pir i mounted on said er ezieh adapter. simultaneously en- 'aid ratchet wheel waen the member is 'rttrzil position, a separate cani assorjh each pawl and pivotally mounted on said member for yieldingly holding the pawl in an intermediate position, and a sprimg; for controlling "ehe operation of the cams.

il. Y

n eonibiinition in spine driven ratchet member adapted to be oscillated by said wheel, a whee engaging); pawl pirotally nnuinted on said member and so located (hereon that its pivot point is spaced from ihe pivot point of said member, a second wheel engaging: pawl pivotally mounted on said member and so located thereon that its pivot point is spaced from the pivot point o1 said member and from the pivot point of said first mentioned pawl, and means for moving said pawls out 01 engagement with said "wheel during oseillaiions oi said memher.

10. In combination in a spring motor, a sailing driven ratchet wheel, a reciprocating member actuated by said wheel, a pawl pivotally mounted on said member and bodily inc able therewith, a second pawl iivotally mounted on said member and iodily movable therewith, and means enine; said pawls {or alternately moving shun out of engagement with said wheel a spring motor, a wheel, a pivoted whereby an impulse is imparted by the wheel to. the member as the member moves in lZ'EC'l'l direction. I

l]. in combination in a spring motor, e sprii'ig driven raeehet wheel, a pivot d 1ne1nber adapted to be oscillated by said wheel, a wlreel-engaging pawl pivotally mounted on said member and so located thereon. that; its pivot point is spaced from the pivot point of said nienibe' and a second wheelengaging pawl pivot-"Hy mounted on said member and so located thereon that lie pivot point is spaced from the pivot point o'l' seid member and to one side of the line define-d by the pivot point oi" the first pawl and f-lH'ii member.

l2. in combination in a spring motor, a, wring); driven ratchet wheel, a pivoted member edapied to be oscillated by said wheel, a \vheel-enp'aging pawl pirotally mounted on said nienibe and so located thereon that its pivot point is sg'iaced from the pivot point of said member, a second wlieel-engaging pawl pivotally mounted on said member and so located thereon that its pivot point is spaced from the pivot point of said member and to one side of the line delined by the pivot points oi? the first pawl and sair men ber respectively, and means acting between ihe pawls for mowing,- them out of; engagement with the wheel during oscillations oi. sa id member.

13. In combination in a spring motor, a S1)lll11-tlll ven ratchet wheel, a pivoted member adapted to be oscillated by said whein, two pawls pivotally mounted on said 1neinher and so located thereon, than; the pivotpoint of each pawl is spaced from the pivot point of the member and lies at one side or" the line defined by the pivotpoint of the other pawl and the pivot point oil the member, a separate pawl actuating tumbler associated with each pawl and pivotally mounted on said member and a spring located between said tumblers.

In testimony whereof, I have hereunto subscribed my name this 27th day 01? ll:- ceinber, 1921.

FRANK llIAGlDSOll. 

